[GHC] #9872: Runing type functions is too slow

[GHC]

#9872: Runing type functions is too slow
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              Reporter:  simonpj     |            Owner:
                  Type:  bug         |           Status:  closed
              Priority:  normal      |        Milestone:
             Component:  Compiler    |          Version:  7.8.3
            Resolution:  fixed       |         Keywords:
      Operating System:              |     Architecture:  Unknown/Multiple
  Unknown/Multiple                   |       Difficulty:  Unknown
       Type of failure:              |       Blocked By:
  None/Unknown                       |  Related Tickets:
             Test Case:              |
              Blocking:              |
Differential Revisions:              |
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Comment (by cactus):

 I don't know enough about the internals of the type family normalizer to
 know if it makes a difference or not; but since the datakinds one is
 closed-world and this is open-world, it might.

 Although now that I think about it, since the type families in question
 are closed, it's not ''really'' open-world anyway...

 I don't know. Your call.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/9872#comment:16>
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